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June 2016, № 6 (194)

Maksutova N.V., Dusaeva G.H. SINANTROPIZATCIJA VEGETATION IN THE SOUTHERN PART OF THE ORENBURG URAL REGION UNDER THE INFLUENCE OF GRAZINGIn the process of economic development of the land man brings to the natural vegetation synanthropic species that are resistant to anthropogenic pressure. In the southern part of the Orenburg Ural region prevail pasture and grasslands. The results of the evaluation by synanthropization steppe, shrub, grassland, coastal aquatic communities common in the study area. The study contains 83 commensal flora species. synanthropization index was 18.4 %, 10.6 % adventization index, apofitizatsii code — 40.9 %. The synanthropic group of plants is mainly dominated by species of the family Asteraceae — 25 species of plants, second only to the family Brassicaceae — 12 species. On 8 species found in families Poaceae and Chenopodiaceae. There was widespread synanthropic species got to meadow plant communities, where their number is about 1/3 of the total number of species of these communities (projective cover of the species from 1 to 10 %). In the steppe and coastal water plant communities distant from settlements with minimal grazing pressure projective cover commensal species does not exceed 3-5 %, but often less than 1 % and grow singly. Number of commensal species in shrub communities is half of the total number of (projective cover of the species is about 1-2 %). It should be noted that the most active processes synanthropization occur in coastal aquatic communities, due to their location in places of watering, and the instability prevailing mesophytic gigrofitnogo components flora.Key words: Sinantropizatcija vegetation, grasslands, plant communities.

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About this article

Authors: Maksutova N.V., Dusaeva G.H.

Year: 2016

Editor-in-chief

Sergey Aleksandrovich
MIROSHNIKOV

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